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Does Nevirapine Interact with Atazanavir?

Nevirapine and Atazanavir have a contraindicated drug interaction according to U.S. FDA drug labeling data. Nevirapine substantially decreases atazanavir exposure and increases nevirapine exposures. Do not co-administer. The mechanism involves nevirapine induces metabolism of atazanavir via cyp3a and 2b6. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This information is based on official FDA drug labeling sourced from OpenFDA and the NIH National Library of Medicine.

Severity
Contraindicated
Nevirapine Class
Human Immunodeficiency Virus 1 Non-Nucleoside Analog Reverse Transcriptase Inhibitor
Management
Do not take together
Data Source
U.S. FDA via OpenFDA

How This Interaction Works

The interaction between Nevirapine and Atazanavir occurs because nevirapine induces metabolism of atazanavir via cyp3a and 2b6. Clinically, this means nevirapine substantially decreases atazanavir exposure and increases nevirapine exposures. do not co-administer. Because of the severity of this interaction, these medications are contraindicated — meaning they should not be taken together under any circumstances. If you are currently taking both, contact your healthcare provider immediately to discuss alternatives.

What To Tell Your Doctor or Pharmacist

If you are taking Nevirapine and your doctor is considering prescribing Atazanavir (or vice versa), make sure to:

  • Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
  • Ask whether the benefits of combining these medications outweigh the risks for your specific situation
  • Ask what symptoms to watch for that would indicate the interaction is causing problems
  • Ask about alternative medications that do not interact with your current regimen
  • Ask how frequently you should be monitored while these are co-prescribed
  • Never stop or change either medication without first consulting your healthcare provider
💊 Nevirapine(Viramune)+💊 Atazanavir(Evotaz)

Severity & Interaction Details

⛔
contraindicated
Avoid this combination
FDA labeling lists this pair as contraindicated. The risk outweighs the benefit in nearly all cases.
Severity scale
MinorContra
On record
Yes
Drug A class
Human Immunodeficiency Virus 1 Non-Nucleoside Analog Reverse Transcriptase Inhibitor
Drug B class
—
Source
NLP:nevirapine

What this means in plain English

Nevirapine substantially decreases atazanavir exposure and increases nevirapine exposures. Do not co-administer.

About Nevirapine and Atazanavir

Nevirapine is a Human Immunodeficiency Virus 1 Non-Nucleoside Analog Reverse Transcriptase Inhibitor. You may recognize them by the brand names Viramune and Evotaz. Both medications are taken by mouth. Nevirapine additionally carries an FDA boxed warning, the FDA's strongest safety alert.

What the FDA label says

"Nevirapine induces metabolism of atazanavir via CYP3A and 2B6"

📖 Source: NLP:nevirapine

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Data integrity: Every interaction shown is extracted directly from official U.S. FDA drug labeling via openFDA and the U.S. National Library of Medicine (NIH) — no interactions are invented, inferred, or manually edited. Maintained by CheckDrugInteractions.com. See our methodology or report a correction at support@checkdruginteractions.com.

Data sourced from U.S. FDA drug labeling via openFDA and the NIH National Library of Medicine, supplemented with a small number of well-established interactions from curated clinical references. For informational purposes only. Always consult your pharmacist or physician.